Exercise logic.propositional.dnf.unicode
Description
Proposition to DNF (unicode support)
Derivation
![](http://ideas.cs.uu.nl/images/external.png)
¬(q → p) ↔ (¬¬((r ∧ r ∧ T) ↔ s) ∨ ¬s)
⇒ logic.propositional.idempand¬(q → p) ↔ (¬¬((r ∧ T) ↔ s) ∨ ¬s)
⇒ logic.propositional.truezeroand¬(q → p) ↔ (¬¬(r ↔ s) ∨ ¬s)